Proposition No. 6 is particularly noticeable because it re-echoes the fallacy of Locke (see page 182-3 _ante_) on personal identity. By opposition to earthly individualities we do not "_become_" persons, but the sense of antagonism between ourselves and other externalities (both men and things), sharpens every day our belief in our own personality, and furnishes its daily verification. The grossness of this writer's Materialism does not hinder him from using the word "soul" on almost every page; and in one of his more recent publications he is candid enough to acknowledge that this old-fashioned entity is not yet quite improved off the face of the Earth. He says:--"Just the properties of the human mind and the impossibility of explaining them, were from the most ancient times one of the main supports of spiritualism and theological systems. True, their explanation is still wanting." Büchner, of course, looks for the speedy elimination of "Soul" proper, on exactly the same grounds which underlie his own whole system. Mental activity and Brain go together (he argues), as Force and Matter go together. It may be answered, that every practical reasoner knows the danger of arguing from _concomitancies_, however well-established, to _Causality_; and the risk is evidently much increased when a like argument is used to _Identity_. Besides, if Mental activity is resolvable into Brain, why should not Matter be likewise resolved into Force? Thus the whole Universe, inanimate and animated, material and psychical, becomes Force. The chain would run in this manner: Mind = Brain = Matter = Force. But how are we to know that Force must be all of one kind and description? Or, again, why may not the concomitancies be rather resolved some other way;--_e.g._, Matter (including Brain) = Force = Mind? Thus Materialism might slide into Idealism, Pantheism, or even Theism; since in some shape or other Mind would form and sustain the Universe. Our last citation of Büchner is taken from a New York Edition of his _Materialism_, p. 19. [148] In other words, that kind of law which pervades the lowest sphere of Nature is conceived as dominant over the highest also. The whole Universe is submitted to its iron rule. There is of Man's Mind as well as of the flagstone with which he paves his streets, one account, one law, one science, one philosophy; nay, strangely enough, as we shall see further on, one religion! The law of stocks and stones is supreme, it rules alike Man's present and his future, and ought to be the sole object of his veneration.